Amazon ssh
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/AccessingInstancesLinux.html
X server for Win - Xming
or
Ubuntu side - https://hostiq.com.ua/wiki/%D0%A3%D1%81%D1%82%D0%B0%D0%BD%D0%BE%D0%B2%D0%BA%D0%B0_RDP_%D1%81%D0%B5%D1%80%D0%B2%D0%B5%D1%80%D0%B0
Ubuntu use https://wiki.ubuntu.com/LightDM as display manager
plus http://scarygliders.net/xrdpconfigurator/
some extensions:
http://ru.stackoverflow.com/questions/619/%D0%A3%D0%B4%D0%B0%D0%BB%D1%91%D0%BD%D0%BD%D1%8B%D0%B9-%D1%80%D0%B0%D0%B1%D0%BE%D1%87%D0%B8%D0%B9-%D1%81%D1%82%D0%BE%D0%BB-%D0%B2-ubuntu-linux